Oceanic Dolphins

All species of dolphins ID with basic scientific information

Atlantic humpback dolphin
(Sousa teuszii)
-Tropical to subtropical west coast of Africa in the southeastern Atlantic Ocean
-Shallow coastal and estuarine waters in the marine Neritic zone
-Up to 2.8 m long
-Grey or white coloration
-Distinct humps under their dorsal fins

Atlantic spotted dolphin
(Stenella frontalis)
-Warm temperate and tropical waters of the Atlantic Ocean
-Young Atlantic spotted dolphins do not have spots
-Speckling occurs between 3 and 4 years
-Spots become denser and spread until the body appears black with white spots
-Curved, spotless, black dorsal fin on their mid-back
-2.26 m (M), 2.29 (F)
-Five-50 individuals but sometimes travel in groups of up to 200

Atlantic white-sided dolphin
(Leucopleurus acutus)
-Cool to temperate waters of the North Atlantic Ocean.
-White to pale-yellow patch behind the dorsal fin on both sides of the body
-2.8 m (M), 2.5 m (F)
-Diet: Opportunistic carnivores, mainly herring, hake, and squid
-Pod size varies, with an average of 50

Australian humpback dolphin
(Sousa sahulensis)
-Dorsal fin is short, triangular in shape
-Lacks the dorsal "hump" typical of humpback dolphins
-Dark gray in color, with flanks shading to the light gray
-White scarring and dark flecking are common in adults
-1-2.7m
-Diet: opportunistic, generalist feeders
-Chase fish into shallow water and beach themselves to catch their prey

Australian snubfin dolphin
(Orcaella heinsohni)
-Brownish on the top, lighter brown along the sides, and a white belly
-Rounded forehead
-Very small, "snubby" dorsal fin
-2.3 m (F), 2,7m (M)
-Diet: fish, shrimp, and cephalopods
-Groups of 2–6, but larger groups (up to 14 individuals) have also been observed
-Populations are usually smaller than 150 individuals

Chilean dolphin (Cephalorhynchus eutropia)
-Off the coast of Chile
-Dorsal fin and flippers are small in proportion to body size
-The throat, underside, and the closest part of the flippers to the body are white
-A black line connects their blowhole, eyes, and dorsal fin
-1.7 m
-Small groups of around two to ten individuals
-Larger gatherings of up to 50 individuals are occasionally sighted

Clymene dolphin
(Stenella clymene)
-Atlantic Ocean
-hybrid speciation descending from the spinner dolphin and the striped dolphin
-2 Meters
-Dorsal fin is less erect and triangular
-Mostly in waters over 100 m in depth
-Diet: Squid and small schooling fish
-Very active dolphins
-Groups from four up to around 150 individuals, but forty seems typical
-Highly vocal

Commerson's dolphin
(Cephalorhynchus commersonii)